P.A. Landers conducts its one-half-million-ton-per-year asphalt and concrete recycling operation at its 68-acre site, about 20 miles from the Boston metro area. "It's very difficult to find a dump site or recycle yard in the greater Boston area, so that's why we have expanded our processing operations at this facility," says Preston A. Landers.
To achieve greater processing capacities, Landers purchased a new Telsmith 44SBS-H-CC portable cone crushing plant in 2013. He chose the compact, closed-circuit, self-contained plant for its low-profile design and its production capabilities. "It's a high producer for its size and that's what we wanted – and its portability allows us to easily relocate it when we need to. Also, we wanted a cone, as our abrasive material is a little unforgiving to an impact plant. You get far better wear life out of this cone versus the blow bar wear in an impactor," says Landers.
As a secondary circuit, the cone reduces material down to 3/4- inch for the bulk of our products," says Landers, adding that the plant is equipped with a magnet to separate out any steel debris.
The Telsmith plant is equipped with a 6-foot x 20-foot triple-deck, triple-shaft horizontal screen. "It's set up to give us quite a bit of flexibility. If we want to, we can open a side panel on the screen box and pull an additional product out onto a side discharge conveyor," says Landers. As to the plant's six on-board conveyors, Landers says that Telsmith engineers customized the conveyor configurations to best meet his applications.
Site Supervisor Chuck Merritt says he's pleased with the customization of the plant, as well as its ease-of-maintenance. "We have easy access around the screen for fast media changeouts," says Merritt. He goes on to say that it's a quick one-man operation to clean out any potential debris buildup. "At the end of the shift we open up the access door to check for any buildup. There are two spillage points, so if the cone fills up, material exits the spillage chutes and falls back on the belt. This is a big time-saver. On our previous cone, a jam-up would cause material to spill up and over the cone, and out onto the catwalks, causing downtime for cleanup," he adds.
Additionally, Merritt says that it's easy to adjust the cone. "It's operator-friendly with digital readouts that indicate the current settings while also allowing us to track liner wear life," he says.
According to Telsmith engineers, the 44SBS Cone is designed with one simple power unit for all its hydraulic systems, which include overload protection, dynamic adjustment, hydraulic lock and clearing, and an anti-spin system. In most installations, an anti-spin system will provide longer manganese life and promote a more cubical product. In the Telsmith design, a small hydraulic motor is attached to the shaft preventing the head from spinning when running with intermittent feed. Also, the Telsmith hydraulic systems utilize a pressure-compensated variable displacement pump to provide the correct hydraulic flow and pressure at all times. To reduce maintenance and downtime and to ensure a more consistent pressure, no accumulators are used.
Most importantly, Merritt and his plant operator stress that the plant delivers considerable production capacity and versatility. "The plant gives us our targeted capacities and we can change from one product to another at the drop of a hat. As fast as we can empty out the feeder and move material off the finish belt, we can go on to another product without any modifications," he says.
"As to the big picture, our investment in the plant is where it needed to be to ensure profitability right from the start," says Landers. "But it's not all about price; it's also the factory support that's important. The Telsmith engineers and service technicians have addressed all of our needs. They are right there for us when we need some help. They have stood behind this plant 100-percent of the time. It runs like a Swiss watch," he says.